1 files changed, 94 insertions, 0 deletions
diff --git a/host/lib21/host_misc.c b/host/lib21/host_misc.c
new file mode 100644
index 00000000..a78a7132
--- /dev/null
+++ b/host/lib21/host_misc.c
@@ -0,0 +1,94 @@
+/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Host functions for verified boot.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+
+#include "2sysincludes.h"
+#include "2common.h"
+#include "2sha.h"
+#include "host_common.h"
+
+int vb2_read_file(const char *filename, uint8_t **data_ptr, uint32_t *size_ptr)
+{
+	FILE *f;
+	uint8_t *buf;
+	long size;
+
+	*data_ptr = NULL;
+	*size_ptr = 0;
+
+	f = fopen(filename, "rb");
+	if (!f) {
+		VB2_DEBUG("Unable to open file %s\n", filename);
+		return VB2_ERROR_READ_FILE_OPEN;
+	}
+
+	fseek(f, 0, SEEK_END);
+	size = ftell(f);
+	rewind(f);
+
+	if (size < 0 || size > UINT32_MAX) {
+		fclose(f);
+		return VB2_ERROR_READ_FILE_SIZE;
+	}
+
+	buf = malloc(size);
+	if (!buf) {
+		fclose(f);
+		return VB2_ERROR_READ_FILE_ALLOC;
+	}
+
+	if(1 != fread(buf, size, 1, f)) {
+		VB2_DEBUG("Unable to read file %s\n", filename);
+		fclose(f);
+		free(buf);
+		return VB2_ERROR_READ_FILE_DATA;
+	}
+
+	fclose(f);
+
+	*data_ptr = buf;
+	*size_ptr = size;
+	return VB2_SUCCESS;
+}
+
+int vb2_write_file(const char *filename, const void *buf, uint32_t size)
+{
+	FILE *f = fopen(filename, "wb");
+
+	if (!f) {
+		VB2_DEBUG("Unable to open file %s\n", filename);
+		return VB2_ERROR_WRITE_FILE_OPEN;
+	}
+
+	if (1 != fwrite(buf, size, 1, f)) {
+		VB2_DEBUG("Unable to write to file %s\n", filename);
+		fclose(f);
+		unlink(filename);  /* Delete any partial file */
+		return VB2_ERROR_WRITE_FILE_DATA;
+	}
+
+	fclose(f);
+	return VB2_SUCCESS;
+}
+
+int vb2_write_object(const char *filename, const void *buf)
+{
+	const struct vb2_struct_common *cptr = buf;
+
+	return vb2_write_file(filename, buf, cptr->total_size);
+}
+
+uint32_t vb2_desc_size(const char *desc)
+{
+	if (!desc || !*desc)
+		return 0;
+
+	return roundup32(strlen(desc) + 1);
+}
+